Electric damper-regulator.



J. D. BOWNE.

ELECTRIC DAMPER REGULATOR. APPLICATION IILED 11017.15, 1906.

2 SHEETS-SHEET 1.

% oentoz No. 872,893. PATENTED DEC. 3, 1907. J. D. BOWNE.

ELECTRIC DAMPER REGULATOR. APPLICATION I'll-12D NOV-.15, 1905.

2 SHEETS-SHEET 2.

Alklllllllll whim? W KO. Emmi/x 6240 mica 7 JOHN D. BOWNE, OF NEW YORK,N. Y., ASSIGNOR OF ONE-HALF TO JOHN WALLACE SLAWSON, OF NEW YORK, N. Y.

ELECTRIC DAMPER-REGULATOR.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed November 15.1906. Serial No. 343.614.

To all whom it may concern:

Be it known-that 1, JOHN D. BOWNE, a

citizen of the United States, residing'at New York, in the county ofNewYork and State of New York, have invented certain new and usefulImprovements in Electric Damper- Rcgulators, of which the following is aspecification.

My invention relates to electric damper regulators, and belongs directlyin that class of apparatus, each example ofv which includes an electricmotor as the operating means, with a divided function, the office of themotor being in part to control the position and movement of the damper,and in. part to throw an electric switch affecting the motor current.

' The object of my invention is to produce damper-operating mechanismallied to the type mentioned, and designed particularly for usein'connec-tion with high pressure steam sources or systems, wherein aslowmoving electric pilot switch is adapted to -make and break thecurrent from a relatively 25 inexpensive low-tension battery thatenergizes suitable magnets arranged to turn a nick-moving reversingswitch included in t e normal street circuit by which the motor isserved, such mechanism being, as an additional object of my invention,special in constructive form and arrangement.

To carry out the objects stated, parts are fashioned and associated asillustrated in the accompanying drawings, of which- Figure 1 representsa side view of all the elements assembled. Fig.2 is a top plan view ofthe low-tension switch. Fig. 3 is a top plan view of the high tensionswitch, and

- shows in diagrammatic form the arrangement of the switch, motorandelectrical conductors.

Like reference letters are used to designate like parts throughout thespecification and drawings.

In the frame A of any suitable casing, is supported the main shaft'B inbearings b. The shaft is provided with a worm 1) near its inner end, andit is driven by the motor W.

The worm drives a reducing ear 0, and the pinion c on the same shaftwith the gear C, still further reduces the speed by its engagement witharm gear DJ The movement of gear D, by means of the sprocket d on thesame shaft, and chain (1 is transmitted to damper E through its sprockete, all

of suitably relative sizes and positions for the purposes desired.

As stated, the motor is included in the street circuit, the conductorsbeing designated b and there is likewise connected in sired resistance,when it is ne'edful to defend the motor against a street current ofexcessive strength. It will be noted that the cur rent is thrown uponthe motor oftentimes when the armature is at rest. A certain advantagefollows from the introduction of the lamp, which is that when the lightis seen to glow with regular brilliancy and at customary intervals it isindicative of the proper working of the apparatus.

In Fig. 3 it is shown that the main terminals of the motor are eachconnected to two mercury cups, and that the two cups thus connected witheach terminal lie on opposite sides and beneath different" ends of therocking, reversing switch F. Thus, cups G and K are connected with onemotor terminal, and on s J and H with the other, the cups G and J eingunder one extremity of switch F, and cups Hand K being situated underthe other end of that switch. The ends of the switch are formed ofblocks of insulation f and f, and the fingers g and j are secured toblock f and are plunged into cups G and J. At the other end of theswitch the fingers h and k are secured to block f and plunge into cups Hand K when the switch rocks. In Fig. 3 it is also illustrated that eachof the street circuit conductors b is connected to two of thefingers,one at each end of'the switch F. That is to say, for example, thepositive wire from the street is connected with-fingers g and h, and thenegative wire with fingers j and 7c. By reason of the particulararrangement of conductors and switch and motor terminals, it is believedto the motor circuit the lamp b, or other debe now discernible that asthe ends of switch F are alternately lowered thestreet current is sentthrough motor b in opposite directions, in other words, the motor isfirst opthe flattened and bent tub'e R, having one end rigidly connectedwith the hollow support 1" and open to boiler steam entering throughpipe r. The other end of the tube is free to move and is closed. It islimited in its movement by the adjustable thumbscrews 1' and it. iscoupled pivotally by means of the rod r with the crank g attached to,switch Q at its 1pivotal point and adapted to rock the switc asthepressure, rising or falling in tube R, tends to straighten or permit it,to curve in the usual manner. As the switch Q rocks, the forks gand gare dipped alternately into pairs of mercury cups, one pair of cups;being supported at each end 0 the rocking beam S t at 1s pivoted at themiddle as shown. The pairs of .cups on the ends of the beam aremarked 8,and 8. Beam S is rocked by means of its crank 8 which is pivotallyconnected by rod d with the wrist d eccentrically carried b the hub orcenter of gear 1).

The mode of operation of this invention is the following: At normalsteam pressure the curved tube R holds switch Q approximately 1 leveland no connections are made. An ex cess of steam pressure rocks switchQand dips fork g into the cups .9, closing the local circuit andenergizingmagnet 'L. Fi ers g and j at once plunge into cups G and andthe motor starts, resulting in the relatively 40 slow turning of gear Din the direction of the arrow, and in a closing movement of damper E.Rod d is drawn to the left and by crank s? rocks downwardly the end ofbeam S which carries the cup's's. If this movement continues, the localcircuit will obviously be broken and the motor stopped, unless the steamas constantly increases in pressure and Y rocks 1 low-tenslon switchcorrespondlngly.

, When, however, the tube reaches its limiting 5O thumbscrew, thelowering of cups 8 just exlained necessarily breaks the circuit. Such 1san extreme instance, however, because the dam er E has been concurrentlyclosed and the raft stop ed. The breaking of the local circuit ha ts themotor and leaves the remaining parts as they may be, but the fall ofressure soon curves the tube B and di s ork q into cuipts s thusenergizing magnet and plunging gers h and 7c mto cups H and K, when, asexplained, the motor again starts but in reverse direction and thecontrary movement of the parts opens the damper. The movement proceedsuntil the renewed pressure or the rocking of beam S breaks the 6 5 ocallcircuit. 1 It is thought to be now clear and no sparking occurs becausethe make and break of the street current is quickly effected.

As intimated above, the opening and closing movements of the damper aregradual and occur upon relatively small variations of temperature. v

Havin now described my invention and explaine the mode of its operation,what I claim is- 1.- In a damper regulator, the combination with thedamper, of electro-magnetic mechanism adapted to operate the damper, aswitch device comprising a pivoted switch, pressure-actuated meansarranged to move the said switch, pivotally supported switch contacts,and connections whereby the said mechanism moves the said switchcontacts, a. second switch, and electrical switch-opcrating meansarranged to act upon the said second switch, the said switch-operatingmeans being in circuit with and controlled by the'said switch device,and the said second switch being arranged to make and break the circuitof the said electro-1nag-' netic mechanism.

2. In a damper regulator, the combination with the damper, of areversible electric motor and mechanism adapted to operate the saiddamper, a reversing switch device comprising a pivoted switch,pressure-actuated means adapted to move the said switch in .two oppositedirections, pivotally supported switch contacts, and connections wherebythe said damper-operating mechanism moves the said switch. contacts, asecond reversing switch, and electrical switch-operating means arrangedto act upon the said second switch, the said switch-operating meansbeing in circuit with and controlled by the said switch device, and thesaid second switch being arranged to make and break and reverse thecircuit of the said electric motor.

3. In a damper regulator, the combination with the damper, ofelectro-magnetic mechanism adapted to operate the damper, a switchdevice comprising a pivoted switch, a pressure-actuated curved tubearranged to move the said switch, pivotally supported switch contacts,and, connections whereb the said mechanism moves the said switchcontacts, a second switch, and electrical switch operating meansarranged to act upon the said second switch, the said switch-oper- 4, Ina damper regulator, the combination wit h the damper, of a reversibleelectric motor and mechanism adapted to operate the said damper, areversing switch device comprising a pivoted switch, a pressure-actuatedcurved tube adapted to move the said switch in two opposite directions,pivotally suported switch contacts, and connections whereby the saiddamper-operating mechanism moves-the said switch contacts, a secondreversing switch, and electrical switch-operating means a ranged to actupon the said second switch, the said switchoperating means being incircuit with and controlled hthe said switch device, and the said secondswitch being arranged to make and break and reverse the circuit of thesaid electric motor. i

."1. In a damper rcgulator, the combination with the damper, ofelectro-magnetic mechanism adapted to operate the damper, a switchdevice including a switch, expansible means constructed and arranged tomove the said switch, pivota-lly supported switch contacts, andconnections whereby the said mechanism moves the said switch contacts, asecond switch, and electrical switch-operating means arranged to actupon the. said econd switch, the said switch operating means being incircuit with and controlled by the said switch device, and the saidsecond switch being arranged to control the circuit of the saidelectro-magnetic mechanism.

6. In a damper regulator, the combination with the damper, ofelectro-magnetic mechanism adapted to operate the damper, a switchdevice including a switch, expansible means constructed and arranged tomove the said switch, pivotally supported switch con t acts, and.connections whereby the said mechanism moves the said switchcontacts inthe same direction in which the said switch is moved, a second switch,and electrical switch-operating means arranged to act upon the saidsecond switch, the said switch-operating means being in circuit with andcontrolled by the said switch device, and the said second switch beingarranged to control the circuit of the said electro-magnetic mechanism.

In testimony whereof I allix my signature in presence of two witnesses.

JOHN I). BOWNE.

Witnesses:

R. B. IIoPKINs, ANNA ScnMmmwUNn.

